#include <iostream>
#define ab ac
#define PL(i) ++i 
#define STR(s) #s

using namespace std;

int main(int argc, char const *argv[])
{
    int ac=10;
    int c=8;
    
    
    cout << "ab=" << ab <<endl;
    cout << "pl=" << PL(c) <<","  <<endl;
    cout << "STR=" << STR(c) <<endl;

    return 0;
}
